Winterization Air vs Chemicals...... Your 2 cents please

With only one years experience I blew out the lines and then added AF. I'd do it again this year. AF is cheap, fixing a burst line could be expensive or complicated.

Air followed by pink, and a large quantity of pink in gray/black /low point.

I blow out with air (40psi). Then I introduce antifreeze through the pump pick up designed to winterize the pipes. I do this because I worry about the pipe between the pump and the place where the outlet pipe connects with the city water intake, which would not blow out with the air.

I suppose I could disconnect the outlet side of the pump but I have never done that.

I do anti-freeze. We don't drink out of the system so after draining and flushing some fresh water through, most of the smell is gone. Then I run some bleach through the system for sanitizing. That takes care of all the antifreeze smell. The air way will work if you get all the water out. Just a small amount of water in a faucet can cause it to crack. Running antifreeze through it will displace the water. Basically air can work, antifreeze will work.

23hitman wrote:
How many PSI (approximately) is ok to use for the air method?

And for the traps, do you just pour some AF into the sink?

Thanks (the Newbie RVer)

I only use about 40 PSI to blow with so that way I'm sure not to blow off a line.

I pour a lot of AF into the kitchen sink, bathrooms sink, bathtub, and toilet. Remember you have to use enough antifreeze in the traps to displace all of the water. And, don't forget to drain your tanks after you do this because the water you are displacing is going into them. Then I add a little more antifreeze to the tanks to keep the dump valves lubricated through out the winter.

korbe wrote:
We do both. Not much more effort and my comfort level goes up a bit when it's really cold out.

Me too.

I used AF for 3 years and the last two have used air with AF only in the traps.
Take your time and don't forget anything, including the outdoor shower.

I pump 60 psi through my lines without issue. Open one faucet at a time until it blows sputter free for 20-30 seconds. Move to the next. When done, I drain the low point drains and hot water heater and then I pour about 2 cups of AF down each sink, the shower and in the toilet. Come Spring, I sanitize and go.

downtheroad wrote:
The air vs anti-freeze is a never ending fall-winter debate here on the Forum.

I carefully and thoroughly use the air method with anti freeze in the traps....BUT our winters are not brutal and are generally mild.

Anti-freeze is a sure thing, but takes more work in the spring to rinse/flush out of the system.

We do both......air and AF in the traps......we live in upstate NY.....no problems.

If I were where you are, I'd lean toward doing the whole anti-freeze application in the lines.

Where I am, winter is for camping! With our previous TT, I would typically blow the lines and put anti-freeze in the traps when we unpacked from our camping trip between Christmas and New Year's.

I don't even have to do that with our current PUP, which lives in the garage anyway.

In our prior RV we did the full AF routine, but with our current rig we blow out the lines and just add AF to the traps. It is certainly more risky just blowing out the lines, but done properly it yields the same results.

One winter I went out to the rig (stored in backyard) during a severe cold spell where wind chill was nearly 30 below and found the half full bottle of AF I used for the traps nearly frozen solid. I thought worse case scenario it would get slushy, maybe it was a bad batch although I had just recently purchased it from Wally World.

Be very cautious if planning to just blowout your water lines unless you know the layout of your rig's plumbing system, one misstep could lead to catastrophe.